NS SECTION 28-AWL-MOV UPDATE REQUIREMENT EARLIEST E/C: 2015.21.08 39-18301 Category: AD Status: N/A Rev: 00 DETECT AND CORRECT CRACKS IN THE INSPAR UPPER SKIN AND REAR SPAR UPPER CHORD Reason Free: 1 THE AD IS APPLICABLE TO 737-100. -200, -200C, -300. -400. AND -500. HENCE NA FOR THIS AIRCRAFT EARLIE